Alexander ingraham



(No Model.)

2 Sheets-Sheet 1. A. INGRAHAM.

ROLLER MILL.

110.453,812. Patented June 9,1891.

,Fiyi

if 272 zeizZOr' (No Model.) 2 Sheets--Sheet 2.

A. INGRAHAM.

ROLLER MILL.

110.453,812. Patented June 9,1891.

n4: scams neas co., mcvofumu., msmmrcw, n. c.

STATES PATENT OFFICE.

ALEXANDER INGRAIIAM, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO SMITH daRICHARDSON, OF SAME PLACE.

ROLLER-MILL.y

SPECIFICATION forming part of Letters Patent No. 453,812, dated J une 9,1891. Application filed August 19, 1890. Serial No. 362,435. (No model.)

.To all whom t may concern:

Be it known that I, ALEXANDER INGRAHAM, of Minneapolis, in the county ofHennepin and State of Minnesota, have invented certain Improvements inRoller-Mills, of which the following' is a specification.

This invention relates to improvements in machines designed for grindingwheat or other grain 5 and the invention consists, gen- 1o erally, incertain improvements in means for supporting and adjusting the yieldingrolls, as hereinafter described, and particularly pointed out in theclaims.

In the accompanying drawings, forming a part of this specification,Figure 1 is a side elevation of my improved rolleranill. Fig. 2 is adetail section of the roll-supporting box and arm of one pair of rolls.Fig. is a vertical section of the roller-mill. Fig. 4 is a horizo zontalsection, partly broken away, through the adjusting-shafts and springs.

In the drawings, 2 represents the frame of the machine, the lower partof which is preferably formed as a single casting, and the up- 'z5 perpart of which preferably contains the feed-hoppers 3, of any suitableconstruction and arrangement.

The mill herein shown is what is known as a double or four-roller7 mill,being provided 3o with two pairs of rolls 3 3 and d 4. The rolls 3 3, ashere shown, are the non-yielding rolls, being mounted in stationaryboxes or bearings, and the rolls 4 4f are the yielding rolls, beingmounted in yielding bearings. I mount 3 5 the non-yie1ding rolls inbearings that are stationary when the mill is in use, but are capable ofbeing vertically adjusted for the purpose of tramming the rolls. pose Iprefer to provide the frame of the machine with the sockets preferablycast in the lower part of the casing and open at the top. The rolls 3are mounted in bearings or boxes 7, having the depending projections il,that nt into the sockets 5 and are capable of movement therein. Aset-screw 11 is arranged in the bottom of the socket and bears againstthe lower end of the projection 9, and a locking-screw 13 extendsthrough the wall of the socket and bears against the projection 5o 9. Bythis means either end of the non-yield- For this pur' ing-roll may bevertically adjusted for the purpose of tramming the rolls.

The rolls e are mounted in boxes upon swinging arms 11. The arms 1i aremounted upon stationary pivots 15 upon the frame of 55 the machine. Theboxes or bearings formed on these arms may be of any suitableconstruction. Arranged in the casing are the adjusting-shafts 17, thatpass through openings in the walls of the casing of sufficient 6c sizeto permit the shafts to move laterally therein.. Arranged upon each endof each shaft is an eccentric pin or journal 19. The lower end of eacharm 1i is provided with a socket, within which is arranged a block 2l, 65 the socket and block being preferably of cylindrical form. Upon eachside of the casing is preferably arranged a housing 23, through whichthe shaft 17 passes. The arms 14 are preferably arranged outside ofthese 7o bearings. In these housings are arranged the blocks 25 andsprings 27, the blocks 25 forming supports for the shafts 17. One end ofeach block 25 is arranged in a recess in the inner wall of the end ofthe housing, and its opposite end is provided with a cylindricalprojection 29 and collar 31. The spring 27 is arranged in the housing,with one end bearing against the collar on the block 25 and with itsopposite end bearing upon a collar 33. So The collar 33 is capable ofadjustment by means of the screw 35, and the block 25 is capable ofadjustment by means of the screw 37, provided, preferably, with ahand-wheel 3Q. Each shaft 17 is provided with an arm 85 4l, preferablysecured thereto by means of a collar and a set-screw a3. Shafts 15 arearranged in the upper part of the mill-casing, and each is provided atits outer end with a handle-lever 4:7. An arm eti), secured to each 9oshaft 45 within the casing, is connected to the arm Lil by means of therod or arm l. By this means, it will be seen, the rolls may be veryaccurately adjusted, while one roll is always capable of yielding topermit any hard substance to pass between the rolls, and the yieldingroll is capable of being moved away from the other roll and returned toits grinding position without any change in the grinding adj ustment.Either end of either roll may be rco independently adjusted, and byadjusting the non-yielding roll vertically the rolls may be accuratelytrammed. As the ends of the shafts 17 are connected to the arms 14E bymeans of the cylindricalblocks 21, arranged in sockets in the ends ofsaid arm, either end Vof the shaft 17 may be independently adjusted,thereby adjusting the corresponding end of the roll 4, and When thisadjustment is made the socket and the cylindrical block 21 act asavertical axis, the block turning in the socket and thus permitting theindependent adjustment of these arms.

I claim as my invention 1. Ina roller-mill, the combination of thenon-yielding roll, the yielding roll, swinging arms supporting saidyielding roll, the shaft 17, having an eccentric connection With saidswinging arms, blocks 25, supporting said shaft, springs 27, engagingsaid blocks, means for adjusting said blocks, and means for turning saidshaft, substantially as described. Y

2. The combination, with the non-yielding roll, of the yielding roll,pivoted arms 11i, supporting said yielding roll, the adj usting-shaft17, having an eccentric connection with said arms, means for turningsaid shaft, blocks 25, supporting said shaft, the adjustingscrews37,moving said blocks, springs 27, engaging said blocks, and the screws35 for adjusting the tension of said springs, substantially asdescribed.

3. In a roller-mill, the combination, With the nonyielding roll, of theyielding roll supported in swinging arms provided with cylindricalsockets, the blocks 21, tting in said sockets, and the adjustable shaft17, having eccentric connection with said blocks 21, for the purposespecified.

In testimony whereof I have hereunto set my hand this 14th day ofAugust, A. D. 1890.

ALEXANDER INGRAIIAM.

In presence of A. M. GASKILL, O. G. HAWLEY.

